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lozanna [386]
3 years ago
14

When five times a number is decreased by 4,the result is 26.what is the number

Mathematics
2 answers:
Bumek [7]3 years ago
4 0
5*n-4=26
26+4=30
30 divided by 5 =6 

answer : 6
Hoochie [10]3 years ago
4 0
The answer is 6

If you were to multiply 5x6= 30

Then subtract 30-4= 26

You would end with 26
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Given f(x)=3x+12, find f(f^-1(0))
mamaluj [8]

Answer:

<h2>0</h2>

Step-by-step explanation:

METHOD 1.

We know:

f\bigg(f^{-1}(x)\bigg)=x

Therefore

f\bigg(f^{-1}(0)\bigg)=0

METHOD 2.

\text{Find}\ f^{-1}(x)

f(x)=3x+12\to y=3x+12

exchange x to y and vice versa:

x=3y+12

solve for y:

3y+12=x          <em>  subtract 12 from both sides</em>

3y=x-12        <em>divide both sides by 3</em>

y=\dfrac{x-12}{3}\to f^{-1}(x)=\dfrac{x-12}{3}

f\bigg(f^{-1}(x)\bigg)\to    replace x in f(x) with the expression\dfrac{x-12}{3}

f\bigg(f^{-1}(x)\bigg)=3\cdot\dfrac{x-12}{3}+12=x-12+12=x

f\bigg(f^{-1}(0)\bigg)\to put x = 0 to f\bigg(f^{-1}(x)\bigg)=x

f\bigg(f^{-1}(0)\bigg)=0

METHOD 3.

\text{Find}\ f^{-1}(x)

f^{-1}(x)=\dfrac{x-12}{3}

Calculate the value of <em>f</em> ⁻¹(x) for x = 0:

f^{-1}(0)=\dfrac{0-12}{3}=\dfrac{-12}{3}=-4

Calculate the value of <em>f(x)</em> for x = -4:

f(4)=3(-4)+12=-12+12=0

6 0
4 years ago
5/7−(−1/7) please answer fast I need iittt
Taya2010 [7]

Answer: \frac{6}{7}

Step-by-step explanation:

\frac{5}{7}-\left(-\frac{1}{7}\right)

Once you take off the parenthesis, your sign should change from negative to positive.

\frac{5}{7}-\left(-\frac{1}{7}\right)=\frac{5}{7}+\frac{1}{7}\\\\\frac{5}{7}+\frac{1}{7}

The fractions now both have the same denominator. Thus, we can add the numerators.

\frac{5+1}{7}\\\\5+1\\\\6=\frac{6}{7}

Therefore, \frac{5}{7}-\left(-\frac{1}{7}\right)=\frac{6}{7}

5 0
3 years ago
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Kipish [7]
345.3 
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3 years ago
How many gallons is 15 meters ?
telo118 [61]

Answer: im pretty sure its 3962.58

Step-by-step explanation

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